Lightning-arrester.



No. 759,796. V PATENTED MAY 10,1904. 7

J. G. BARCLAY- LIGHTNING ARRESTER.

APPLICATION FILED SEPT; 9, 1903.

I0 HODEL.

WITNESSES? INVENTOR AATORNEYS' E NORRIS Firms :0. PHOTO-LITHO- wgsnmorcu Patented May 10, 1904.

UNITED STATES PATENT OFFICE.

JOHN C. BARCLAY, OF NEW YORK, N. Y.

LIGHTNING-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 759,796, dated May 10, 1904. Application filed September 9, 1908. Serial No. 172,476. (No model.)

To all whom it may concern.-

. Be it known that I, JOHN G. BARCLAY, acitizen of the United States,residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Lightning-Arresters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to make and use the same.

My invention relates to combined fuse-holders and lightningarresters; and it consists in the features of invention hereinafter setforth, and particularly pointed out in the claims.

7 The objects of my invention are to improve the construction of combined fuse-holders and lightning-arresters, to make the device compact, simple, and relatively inexpensive, and to so locate the lightning-arrester that it shall be readily accessible for inspection and renewal, but nevertheless shall not increase the space required for the fuse-holder.

I will now proceed to describe my invention with reference to the accompanying drawings and will then point out the novel features in claims.

In the drawings, Figure 1 shows a side elevation of one form of my improved combined fuse holder and lightning arrester. Fig. 2 shows a longitudinal vertical section of the lightning-arrester and the parts of the fuseholder adjacent thereto. Fig. 3 shows atransverse section of the lightning-arrester.

My combined fuse-holder and lightning-arrester comprises a base 1, of suitable materialsuch as slate, porcelain, or the likespring-clips 2, secured to the base by screws 3 and adapted to receive a fuse-cartridge 4, and a lightning arrester proper comprising conducting plates or blocks 7 of suitable material, such as carbon, an insulating member 8, of mica or other suitable material, between said plates or blocks, and a spring-clip for holding the said conducting-plates, said clip comprising spring-arms 9 and 10, the former secured to one of the fuse-clips 2, the latter secured to the base 1.

As shown in the drawings, the lightningarrester proper is located between the base 1 and the position occupied by the fuse-cartridge when held by the fuse-clips 2, the conducting-plates 7 being nearly parallel with the base. By so locating the lightning-arrester I am enabled to employ a base 1 no larger than would be required for a fuse-holder .of similar type having no lightning-arrester.

The arrangement of the conducting-plates 7 permits the use of fuse-clips which are quite short and which, therefore, may be made of much thinner metal than would be possible if said plates were set endwise with respect to the base. In this position the lightning-arrester is readily accessible for inspection and renewal of its parts, it being practicable under most circumstances to remove the conducting-plates from their clips without removal of the fuse, though when necessary the fuse may be removed so readily that its presence above the lightning-arrester does not interfere materially with access to the lighthing-arrester.

The spring-arm 10 is offset slightly from the base, so that said arm may have spring action, and also so that when the conductingplates are in place within the clip they shall be held in a slightly-inclined position, which inclined position facilitates withdrawing said plates from the clip. The other spring-arm 9 is offset from the base a greater amount to afford the necessary space for the reception of the conducting-plates. The outer end of the arm 9 is upturned to facilitate insertion of the conducting-plates, and the end of spring 10 is similarly upturned to form a stop. The conducting-plates are provided with grooves to receive the said arms 9 and 10, as shown in Fig. 3, lateral displacement of the plates being thereby prevented. The said arms are further provided with projections 12, engaging corresponding depressions in the conductingplates, so as to prevent accidental longitudinal or endwise movement of the plates in the clips. In this way I avoid any possibility of accidental escape of the conducting-plates or the inica sheet between them from the device. This is very important, inasmuch as the device is frequently located on railway-bridges and similar structures, where it is subjected to great vibration tending to jar the conducting-plates out of their clip. It is the more important to prevent this from happening, since escape of the conducting-blocks from their clip does not open the circuit in which the fuse is located and so does not give automatic indication of trouble, as would be the case if the fuse were to fall out.

The insulating member 8 is preferably perforated, as shown at 13, to permit the lightning discharge to jump from one plate 7 to the other.

What I claim is 1. In acombined fuse-holder and lightning arrester, the combination with a suitable base, and fuse-holding spring-clips secured thereto and arranged to receive a fuse-cartridge, of a lightning-arrester located between said base and the position to be occupied by a fuse, and comprising conducting-plates, an insulating member separating the same, and two springarms for holding said plates, said arms secured to said base and arranged substantially parallel thereto.

2. In a combined fuse-holder and lightningarrester, the combination with a suitable base, and fuse-holding spring-clips secured thereto and arranged to receive a fuse-cartridge, of a lightning-arrester located between said base and the position to be occupied by a fuse, and comprising conducting-plates, an insulating member separating the same, and two springarms for holding said plates, said arms secured to said base and arranged substantially paralmember separating the same, and tWo springarms for holding said plates, said arms secured to said base and arranged substantially parallel thereto, one arm offset slightly from the base, to permit spring action, the other offset to a greater extent to afford space between it and said first arm for reception of the plates, said arms having projections fitting into corresponding recesses of said conducting-plates to prevent accidental escape of said plates.

In testimony whereof I affix my signature in the presence of two witnesses.

JOHN C. BARCLAY.

W'itnesses:

H. M. MARBLE, C. F. CARRINeToN. 

